Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Dukelsky, Jorge"'
Publikováno v:
Phys. Rev. E 109, 064102 (2024)
We present a theory characterizing the phases emerging as a consequence of continuous symmetry-breaking in quantum and classical systems. In symmetry-breaking phases, dynamics is restricted due to the existence of a set of conserved charges derived f
Externí odkaz:
http://arxiv.org/abs/2402.09248
Autor:
Liu, Zhiyuan, Gao, Fei, Chen, Guo P., Henderson, Thomas M., Dukelsky, Jorge, Scuseria, Gustavo E.
Publikováno v:
Phys. Rev. B 108, 085136(2023)
The antisymmetrized geminal power (AGP), a wave function equivalent to number-projected Hartree--Fock--Bogoliubov (HFB), and number-projected Bardeen--Cooper--Schrieffer (BCS) when working in the paired (natural orbitals) basis, has proven to be an e
Externí odkaz:
http://arxiv.org/abs/2303.04925
Autor:
Rubio-García, Álvaro, Corps, Ángel L., Relaño, Armando, Molina, Rafael A., Pérez-Bernal, Francisco, García-Ramos, José Enrique, Dukelsky, Jorge
Publikováno v:
Phys. Rev. A 106, L010201 (2022)
We study a model of a quantum collective spin weakly coupled to a spin-polarized Markovian environment and find that the spectrum is divided into two regions that we name normal and exceptional Liouvillian spectral phases. In the thermodynamic limit,
Externí odkaz:
http://arxiv.org/abs/2202.09337
The dynamics of open quantum systems can be described by a Liouvillian, which in the Markovian approximation fulfills the Lindblad master equation. We present a family of integrable many-body Liouvillians based on Richardson-Gaudin models with a comp
Externí odkaz:
http://arxiv.org/abs/2102.13452
Publikováno v:
Phys. Rev. B 104, 060503 (2021)
Assisted by general symmetry arguments and a many-body invariant, we introduce a phase of matter that constitutes a topological SO(5) superfluid. Key to this finding is the realization of an exactly solvable model that displays some similarities with
Externí odkaz:
http://arxiv.org/abs/2102.00492
Publikováno v:
J. Phys. A: Math. Theor. 53 395302 (2020)
We derive the exact solution of a system of N-level atoms in contact with a Markovian reservoir. The resulting Liouvillian expressed in a vectorized basis is mapped to an SU(N) trigonometric Richardson-Gaudin model whose exact solution for the comple
Externí odkaz:
http://arxiv.org/abs/2005.05155
Publikováno v:
Phys. Rev. A 101, 012105 (2020)
We present an extension of the L\"owdin strategy to find arbitrary matrix elements of generic Slater determinants. The new method applies to arbitrary number of fermionic operators, even in the case of a singular overlap matrix.
Externí odkaz:
http://arxiv.org/abs/1909.12634
Publikováno v:
Phys. Rev. Research 1, 032021 (2019)
We present an exactly-solvable $p$-wave pairing model for two bosonic species. The model is solvable in any spatial dimension and shares some commonalities with the $p + ip$ Richardson-Gaudin fermionic model, such as a third order quantum phase trans
Externí odkaz:
http://arxiv.org/abs/1908.02821
Autor:
Garros, Adán, Alcoba, Diego R., Capuzzi, Pablo, Lain, Luis, Torre, Alicia, Oña, Ofelia B., Dukelsky, Jorge
Publikováno v:
Journal of Chemical Physics; 9/28/2023, Vol. 159 Issue 12, p1-9, 9p
Publikováno v:
Phys. Rev. C 95, 064306 (2017)
The failures of single-reference coupled cluster for strongly correlated many-body systems is flagged at the mean-field level by the spontaneous breaking of one or more physical symmetries of the Hamiltonian. Restoring the symmetry of the mean-field
Externí odkaz:
http://arxiv.org/abs/1703.02123